选择句子补全对话。(共10分) Sarah:. Sarah:. Peter:Thanks.Do you have a computer room? Sarah:.It’s on the first floor. Peter:Oh,so many computers.. Sarah:Yes,it is. We have many books. Peter:? Sarah:Oh,It’s 4 o’clock.It’s time to go home. Peter:. Sarah:Yes,it is.I have an umbrella.Go with me. Peter:Thanks.